Insulating-paint.



. UNITED STATES PATENT FFIcE.

LEONARD M. RANDOLPH, OF NEWARK, NEYV JERSEY, ASSIGNOR OF SIX- TENTHS TOBANOROFT G. BRAINE AND LAWVRENOE F. BRAINE, OF

BROOKLYN, NEW YORK.

INSULATING-PAINT.

SPECIFICATION forming part of Letters Patent No. 701,392, dated June 3,1902.

Application filed September 5, 1901.

To rtZZ whomit may concern:

Be it known that I, LEONARD M. RANDOLPH, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented an Improvement in Japanning and Insulating-Paint Compounds andMethods of Manufacturing the Same, of which the following is aspecification.

The object of my present invention is to produce a material adapted forcovering or painting the surfaces of metal forms, as a japanning-varnishorinsulating-pain t. In carrying out my invention I employ a wasteproduct from the manufacture of varnish, japans, and shellac*that is,thecleanings of tanks holding such materials and known as varnish residueor mud in the trade. With this material I employ powdered peat andnaphtha or other suitable materials as a thinning agent. In themanufacture of said japanning orinsulating-paint the said Varnishresidue or mud is rendered hot-about 300 Fahrenheit-and is then strainedthrough cloth or suitable straining material to remove therefrom lumpsand pieces of various kinds. To the strained material While hot I addabout twenty-five per cent. of powdered peat and mix or stir the samethoroughly into a homogeneous mass. This material is then thinned downby the addition of naphtha or similar solvent to such consistency aswill render the same ready for use. This material is laid onto thesurfaces of metal or other materials preferably with a brush and byapplying a heavy coat,which coat is thereafter advantageously baked onin a suitable oven at from 100 Fahrenheit to 175 Fahrenheit. Thefinished japanning or paint is impervious to heat, cold, and moisture,isproof against acid and other chemicals, and is a substantially-perfectelectrical insuerial No. 74,442- (No specimens.)

lation upon the surface of the material to which the same is applied,and I prefer in the case of the insulating-paint to continue thetemperature in the baking-oven up to as high as 275 Fahrenheit to renderthe same impervious to heat. These operations usually oonsume from threeto forty-eight hours, aocording to the results to be obtained.

I claim as my invention-- 1. The japanning or insulating compound hereinspecified,consisting of varnish residue, powdered peat and naphtha orsimilar solvent, substantially as set forth.

2. The japanning orinsulating-paintherein specified and consisting ofvarnish residue, about twenty-five per cent. of powdered peat, andnaphtha or similar solvent sufficient to thin the same down to thedesired consistency, substantially as set forth.

3. The method herein specified of manufacturing a japanning orinsulating-paint, consisting in taking a waste product from themanufacture of varnish, japans and shellac, and known as varnishresidue, heating the same hot and straining the same through cloth orsimilar material for the removal of various foreign substances, addingto the hot strained varnish residue about twenty-five per cent. ofpowdered peat, stirring the same thoroughly to form a homogeneous mass,and adding thereto naphtha or similar solvent material for the purposeof thinning the same down to the desired consistency, substantially asset forth.

Signed by me this 22d day of August, 1901.

LEONARD M. RANDOLPH.

Witnesses:

GEO. T. PINCKNEY, S. T. HAVILAND.

